Method for detecting the distance between the counterweight and the car of an elevator

Abstract

The present application relates to the technical field of special equipment inspection, and particularly relates to a detection method for the distance between the counterweight and the car of an elevator, comprising the following steps: step one, installing a laser measuring element; the laser measuring element comprises a first laser measuring scale and a second laser measuring scale; the first laser measuring scale is arranged on the car and is used for measuring the vertical distance from each measuring point of the first laser measuring scale along the length direction to the side of the counterweight close to the car; the second laser measuring scale is arranged on the counterweight and is used for measuring the vertical distance from each measuring point of the second laser measuring scale along the length direction to the side of the car close to the counterweight; step two, calibration; step three, measurement; and step four, data processing; the present application only needs manual operation when the measuring element is installed, and does not need manual intervention when the measurement is performed, thereby greatly improving the safety of the measurement process; meanwhile, only the correspondence between the first laser measuring scale and the second laser measuring scale needs to be ensured during installation, and the distance between the two is not needed to be considered, so that the installation process is greatly simplified.

Description

Technical Field

[0001] This invention relates to the field of special equipment inspection technology, and in particular to a method for detecting the distance between the elevator counterweight and the car. Background Technology

[0002] Safety Technical Specification 7001-2009 requires that the distance between the car and its associated components and the counterweight (balance weight) should not be less than 50mm.

[0003] Before using the elevator, ensure that the above requirements are met. If the distance is too small, the elevator car and the counterweight may scrape or even collide, which may cause serious harm to the people in the car. Similar accidents have occurred in China.

[0004] Currently, the inspection for this item usually involves moving the elevator to the middle position, so that the car and counterweight are in a horizontal position. The inspector stands on the top of the car and uses a steel ruler or tape measure to measure the distance from the edge of the car top to the counterweight.

[0005] This approach has many problems: 1. When personnel stand on the car top, they can only measure the distance between the edge of the car top and the counterweight. Because the car is suspended in mid-air, the distances from the middle and bottom parts of the car to the counterweight can only be observed visually and cannot be measured. If there are any protruding parts at the bottom of the car, it is impossible to accurately determine whether the distance from these parts to the counterweight meets the requirements; only visual observation and comparison are possible.

[0006] 2. The counterweight (balance weight) of commonly used elevators is over 2 meters long. Even when measuring only the distance from the top of the car to the counterweight, inspectors using a steel ruler or tape measure need to move the car a short distance before taking the measurement. This only allows for measuring the distance between a few points, making the entire process time-consuming and laborious, and it's impossible to achieve full-coverage distance measurement from surface to surface.

[0007] 3. Even if the closest part of the entire car to the counterweight is at the top of the car, the inspector needs to use a steel ruler or tape measure to measure in the gap between the car and the counterweight. This process is quite dangerous, and the measuring tools are very easy to tilt, which will cause measurement errors. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for detecting the distance between the elevator counterweight and the car. This method only requires manual installation of the measuring components and does not require manual intervention during measurement, which greatly improves the safety of the measurement process. At the same time, during installation, it is only necessary to ensure that the first laser measuring ruler and the second laser measuring ruler correspond, without having to consider the distance between them, which greatly simplifies the installation process.

[0009] The objective of this invention is achieved through the following technical solution:

[0010] A method for detecting the distance between the elevator counterweight and the car includes the following steps:

[0011] Step 1: Install the laser measuring components: The laser measuring components include a first laser measuring ruler and a second laser measuring ruler. The first laser measuring ruler is mounted on the car and is used to measure the vertical distance from each measuring point along the length of the first laser measuring ruler to the side of the counterweight closest to the car. The second laser measuring ruler is mounted on the counterweight and is used to measure the vertical distance from each measuring point along the length of the second laser measuring ruler to the side of the car closest to the counterweight. (The first and second laser measuring rulers are positioned opposite each other.)

[0012] Step 2, Calibration: Position the first laser measuring ruler and the second laser measuring ruler on the same horizontal plane, and set each measuring point of the first laser measuring ruler to correspond one-to-one with each measuring point of the second laser measuring ruler (one-to-one correspondence means head to head, tail to tail). Start the first laser measuring ruler or the second laser measuring ruler to measure the vertical distance between each measuring point on the first laser measuring ruler and the second laser measuring ruler, and obtain the measurement results (G1, G2, G3, ..., Gn).

[0013] Step 3, Measurement: Run the elevator and make the counterweight (the side of the counterweight closest to the car) pass through the measuring end of the first laser measuring ruler. Record the minimum value measured at each measuring point of the first laser measuring ruler (A1, A2, A3, ..., An).

[0014] Make sure the entire car (the side of the car and related components closest to the counterweight) passes through the measuring end of the second laser measuring ruler, and record the minimum value (B1, B2, B3, ..., Bn) measured at each measuring point of the second laser measuring ruler;

[0015] Step 4: Data Processing

[0016] (A1+B1-G1, A2+B2-G2, A3+B3-G3…, An+Bn-Gn); (1)

[0017] Let A1+B1-G1=C1, A2+B2-G2=C2, A3+B3-G3=C3…, An+Bn-Gn=Cn, then equation (1) simplifies to (C1, C2, C3, …, Cn), and the minimum distance between the car and the counterweight is min{C1, C2, C3, …, Cn}.

[0018] Furthermore, the first laser measuring ruler includes n laser ranging sensors arranged along its length (where the second laser measuring ruler has the same structure as the first laser measuring ruler, and the laser ranging sensors on the second laser measuring ruler are arranged end to end in sequence with the laser ranging sensors on the first laser measuring ruler).

[0019] Furthermore, in step one, the first laser measuring ruler is installed on the top of the car, and the second laser measuring ruler is installed on the top of the counterweight.

[0020] Furthermore, in step one, the first laser measuring ruler is installed at the bottom of the car, and the second laser measuring ruler is installed at the bottom of the counterweight.

[0021] Furthermore, in step three, the elevator runs twice. During the first run, the first laser measuring ruler measures the vertical distance from each measuring point to the counterweight. During the second run, the second laser measuring ruler measures the vertical distance from each measuring point to the car.

[0022] Furthermore, in step one, the first laser measuring ruler is installed on the top of the car, and the second laser measuring ruler is installed at the bottom of the counterweight.

[0023] Furthermore, in step one, the first laser measuring ruler is installed at the bottom of the car, and the second laser measuring ruler is installed at the top of the counterweight.

[0024] Furthermore, in step three, the elevator runs once, and during the elevator operation, the first laser measuring ruler measures the vertical distance from each measuring point to the counterweight;

[0025] The second laser measuring ruler measures the vertical distance from each measuring point to the car.

[0026] The beneficial effects of this invention are:

[0027] 1) This invention only requires manual installation of the measuring components, and no manual intervention is required during measurement, which greatly improves the safety of the measurement process; at the same time, during installation, it is only necessary to ensure that the first laser measuring ruler and the second laser measuring ruler correspond, without having to consider the distance between them, which greatly simplifies the installation process.

[0028] During measurement, two laser measuring rulers can be used to achieve comprehensive measurement of the car and counterweight, preventing missed detections and misjudgments.

[0029] 2) This invention only requires a laser rangefinder to perform full-size scanning measurements on the car and the counterweight (balance weight) respectively, without the need for multiple stops, making the measurement process faster.

[0030] 3) Compared with traditional measurement methods, this invention eliminates the need for inspectors to repeatedly insert their hands and measuring tools into the gap between the car and the counterweight, reducing the risk to the inspectors and improving safety during measurement.

[0031] 4) This invention can be used not only for the inspection of special equipment, but also for real-time detection. The laser rangefinder is installed on the top of the car for real-time detection. Once the distance exceeds the allowable value, an alarm is issued to remind maintenance personnel to carry out timely repairs. Attached Figure Description

[0032] Figure 1 This is a top view of the car and counterweight during the detection of the distance between the elevator counterweight and the car in an embodiment of the present invention;

[0033] Figure 2 This is a side view of the car and counterweight during the inspection.

[0034] Figure 3 for Figure 2 Enlarged view of the local area at point X in the middle;

[0035] In the diagram, 1. First laser measuring ruler; 2. Second laser measuring ruler; 3. Car; 4. Counterweight. Detailed Implementation

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] See Figures 1-3 The present invention provides a technical solution:

[0038] Example 1:

[0039] like Figures 1-3 As shown, a method for detecting the distance from the elevator counterweight to the car includes the following steps:

[0040] Step 1: Install the laser measuring components: The laser measuring components include a first laser measuring ruler 1 and a second laser measuring ruler 2. The first laser measuring ruler 1 is mounted on the car 3 and is used to measure the vertical distance from each measuring point along the length of the first laser measuring ruler 1 to the side of the counterweight 4 closest to the car 3. The second laser measuring ruler 2 is mounted on the counterweight 4 and is used to measure the vertical distance from each measuring point along the length of the second laser measuring ruler 2 to the side of the car 3 closest to the counterweight 4. (The first and second laser measuring rulers are arranged opposite each other, meaning that each measuring point of the first laser measuring ruler and each measuring point of the second laser measuring ruler are arranged end-to-end.)

[0041] The first laser measuring ruler 1 is installed on the top of the car 3, and the second laser measuring ruler 2 is installed on the top of the counterweight 4. The length of the first laser measuring ruler is the same as the width of the counterweight, and the length of the second laser measuring ruler is the same as the width of the car. The width of the counterweight is the same as the width of the car.

[0042] Alternatively, the first laser measuring ruler may be installed at the bottom of the car, and the second laser measuring ruler may be installed at the bottom of the counterweight.

[0043] Step 2, Calibration: Position the first laser measuring ruler and the second laser measuring ruler on the same horizontal plane, and set each measuring point of the first laser measuring ruler to correspond one-to-one with each measuring point of the second laser measuring ruler (one-to-one correspondence means head to head, tail to tail). Start the first laser measuring ruler or the second laser measuring ruler to measure the vertical distance between each measuring point on the first laser measuring ruler and the second laser measuring ruler, and obtain the measurement results (G1, G2, G3, ..., Gn).

[0044] Step 3, Measurement: Run the elevator and make the counterweight (the side of the counterweight closest to the car) pass through the measuring end of the first laser measuring ruler. Record the minimum value measured at each measuring point of the first laser measuring ruler (A1, A2, A3, ..., An).

[0045] The measurement result of the first laser measuring ruler at each moment is a line. Therefore, the measurement of the entire counterweight is completed in a continuous time (the time when the side of the counterweight that is completely close to the first laser measuring ruler passes through the first laser measuring ruler). The same applies to the second laser measuring ruler described below.

[0046] Make sure the entire car (the side of the car and related components closest to the counterweight) passes through the measuring end of the second laser measuring ruler, and record the minimum value (B1, B2, B3, ..., Bn) measured at each measuring point of the second laser measuring ruler;

[0047] Step 4: Data Processing

[0048] (A1+B1-G1, A2+B2-G2, A3+B3-G3…, An+Bn-Gn); (1)

[0049] Let A1+B1-G1=C1, A2+B2-G2=C2, A3+B3-G3=C3…, An+Bn-Gn=Cn, then equation (1) simplifies to (C1, C2, C3, …, Cn), and the minimum distance between the car and the counterweight is min{C1, C2, C3, …, Cn}.

[0050] Furthermore, the first laser measuring ruler includes n laser ranging sensors arranged along its length (where the second laser measuring ruler has the same structure as the first laser measuring ruler, and the laser ranging sensors on the second laser measuring ruler are arranged end to end in sequence with the laser ranging sensors on the first laser measuring ruler).

[0051] In step three, the elevator runs twice. During the first run, the first laser measuring ruler measures the vertical distance from each measuring point to the counterweight. During the second run, the second laser measuring ruler measures the vertical distance from each measuring point to the car. Because the car and counterweight run in opposite directions, when the first and second laser measuring rulers are simultaneously placed at the top or bottom of the (car / counterweight), the elevator needs to run twice after calibration to complete the measurement.

[0052] In step one, the first and second laser measuring rulers can be connected to a smart terminal (mobile phone) via Bluetooth, but are not limited to that connection. During measurement, the first and second laser measuring rulers automatically calculate the minimum value and upload it to the mobile phone.

[0053] This invention requires only manual installation of the measuring components, and no manual intervention is needed during measurement, which greatly improves the safety of the measurement process. At the same time, during installation, it is only necessary to ensure that the first laser measuring ruler and the second laser measuring ruler correspond, without having to consider the distance between them, which greatly simplifies the installation process.

[0054] During measurement, two laser measuring rulers can be used to achieve comprehensive measurement of the car and counterweight, preventing missed detections and misjudgments.

[0055] This invention only requires a laser rangefinder to perform full-size scanning measurements of the car and the counterweight, eliminating the need for multiple pauses and making the measurement process faster.

[0056] Compared to traditional measurement methods, this invention eliminates the need for inspectors to repeatedly insert their hands and measuring tools into the gap between the car and the counterweight, reducing the risk to the inspectors and improving safety during measurement.

[0057] This invention can be used not only for the inspection of special equipment, but also for real-time detection. A laser rangefinder is installed on the top of the car for real-time detection. Once the distance exceeds the allowable value, an alarm is issued to remind maintenance personnel to carry out timely repairs.

[0058] Example 2:

[0059] The difference between this embodiment and implementation 1 is that, in step one, the first laser measuring ruler is set on the top of the car, and the second laser measuring ruler is set on the bottom of the counterweight.

[0060] Alternatively, in step one, the first laser measuring ruler is installed at the bottom of the car, and the second laser measuring ruler is installed at the top of the counterweight.

[0061] In step three, the elevator runs once, and during the elevator operation, the first laser measuring ruler measures the vertical distance from each measuring point to the counterweight.

[0062] The second laser measuring ruler measures the vertical distance from each measuring point to the car.

[0063] During step two, the top of the car is aligned with the bottom of the counterweight, or the bottom of the car is aligned with the top of the counterweight. Once the calibration is complete, proceed to step three. As the elevator moves, the first laser measuring ruler on the car and the second laser measuring ruler on the counterweight can be used simultaneously, thus improving measurement efficiency.

[0064] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A method for detecting the distance from the elevator counterweight to the car, characterized in that, Includes the following steps: Step 1: Install the laser measuring device: The laser measuring device includes a first laser measuring ruler and a second laser measuring ruler. The first laser measuring ruler is installed on the car and is used to measure the vertical distance from each measuring point of the first laser measuring ruler along the length direction to the side of the counterweight near the car. The second laser measuring ruler is installed on the counterweight and is used to measure the vertical distance from each measuring point of the second laser measuring ruler along the length direction to the side of the car near the counterweight. Step 2, Calibration: Position the first and second laser measuring rulers on the same horizontal plane, ensuring a one-to-one correspondence between each measuring point on the first and second laser measuring rulers. Activate either the first or second laser measuring ruler to measure the vertical distance from each measuring point on the first laser measuring ruler to the second laser measuring ruler, obtaining the measurement results. ; Step 3: Measurement: Run the elevator until the entire counterweight passes the measuring end of the first laser measuring ruler, and record the minimum value measured at each measuring point of the first laser measuring ruler. ; The entire car body passes through the measuring end of the second laser measuring ruler, and the minimum value measured at each measuring point of the second laser measuring ruler is recorded. ; Step 4: Data Processing ； （1） make Then equation (1) simplifies to The minimum distance between the car and the counterweight is ; The first laser measuring ruler includes n laser rangefinders arranged along its length.

2. The method for detecting the distance from the elevator counterweight to the car according to claim 1, characterized in that, In step one, the first laser measuring ruler is installed on the top of the car, and the second laser measuring ruler is installed on the top of the counterweight.

3. The method for detecting the distance from the elevator counterweight to the car according to claim 1, characterized in that, In step one, the first laser measuring ruler is set at the bottom of the car, and the second laser measuring ruler is set at the bottom of the counterweight.

4. The method for detecting the distance from the elevator counterweight to the car according to claim 2 or 3, characterized in that, In step three, the elevator runs twice. During the first run, the first laser measuring ruler measures the vertical distance from each measuring point to the counterweight. During the second run, the second laser measuring ruler measures the vertical distance from each measuring point to the car.

5. The method for detecting the distance from the elevator counterweight to the car according to claim 1, characterized in that, In step one, the first laser measuring ruler is installed on the top of the car, and the second laser measuring ruler is installed at the bottom of the counterweight.

6. The method for detecting the distance from the elevator counterweight to the car according to claim 1, characterized in that, In step one, the first laser measuring ruler is set at the bottom of the car, and the second laser measuring ruler is set at the top of the counterweight.

7. The method for detecting the distance from the elevator counterweight to the car according to claim 5 or 6, characterized in that, In step three, the elevator runs once, and during the elevator operation, the first laser measuring ruler measures the vertical distance from each measuring point to the counterweight. The second laser measuring ruler measures the vertical distance from each measuring point to the car.

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